3.0. An alternative to the bookmarks menu, it is similar to sidebars found in
Internet Explorer,
Opera, and
Safari. Each browser has a built-in tool for managing the list of bookmarks. The list storage method varies, depending on the browser, its version, and the operating system on which it runs. Netscape browsers store bookmarks in the single HTML-coded file
bookmarks.html. This approach permits publication and printing of a categorized and indented catalog, and works across platforms. Bookmark names need not be unique. Editing this file outside its native browser requires editing HTML. For
data portability and
interoperability, most modern Web browsers support importing from and exporting to the Netscape bookmarks.html format. Beginning with
Firefox 3,
Mozilla Corporation began using
SQLite in browser releases to store bookmarks, history, cookies, and preferences in a transactionally secure database. Internet Explorer's "Favorites" (also "Internet Shortcuts") are stored as individual files named with the original link name, and the filename extension ".URL", for example "Home Page.URL" collected in a directory named "Favorites" which may have subdirectories. Bookmark names must be unique within a folder. Each file contains the original URL and Microsoft-specific
metadata. Browsers have varying abilities to import and export bookmarks to favorites, and vice versa. ==Bookmarklets==